Trunk lock



Feb. 11, 1930. LQNG 1,747,120

TRUNK LOCK Filed Sept. 15. 1928 Patented Feb. 11, 1930 PATENT GFFICEALLEN T. LONG, OF PETERSBURG, VIRGINIA TRUN K LOCK Application filedSeptember 15, 1928. Serial No. 306,114.

This invention relates to trunk locks and has for an important objectthereof the. provision of a lock of this character in which the numberof parts and the number of steps in manufacture are materially reducedand in which the facilities for key changes are increased.

A more specific object of the invention is the provision of animprovement of the lock plate construction which operates the belts inthis type of lock to eliminate the use of extra pins and the lock forguiding the plate and providing the operating connection between theplate and the bolts.

A further and more specific object of the invention is to provide asingle unitary plate which may be produced by stamping and which willserve at once to provide the tripping elements for the bolts, the guidefor the key barrel and stops for the key.

A still further object of the invention is to provide in a lock of thischaracter a construction such that a plate entering into the normalconstruction of the lock is enabled to act as a tumbler plate, affordingkey changes.

These and other objects I attain by the construction shown in theaccompanying drawing, wherein for the purpose of illustration is shown apreferred embodiment of my invention and wherein Figure 1 is a sideelevation partially in section of a trunk lock constructed in accordancewith my invention; I

Figure 2 is a view of the lock cup with the key plate and barrelremoved;

Figure 3 is a similar view with the key plate in position, the barrelbeing shown in section;

Figure at is a section on the line 4:4: of Figure 1;

' Figure 5 is a front elevation of the lock;

Figure 6 is a fragmentary plan of a slightly modified form of key plate;

Figure 7 is a side elevation of the key illustrating the key notchesprovided by the lock arrangement disclosed.

Referring now more particularly to the drawing, the numeral 10 generallydesignates the hinge plate of a trunk lock, the numeral 11 a lock cupand the numeral 12 a cap.

Arranged within the cup are a pair of bolts 13, each having at its innerend an angular shoulder 14, the purpose of which will presently appear.These bolts, as in the usual construction, are urged outwardly by aspring 15 and have associated therewith the usual guide pins 16.

In accordance with my invention, the upper surfaces of these bolts,which are usually provided with pins for co-action with an oscillatablekey plate, are made perfectly smooth. The key plate employed as atpresent illustrated comprises a single metallic disk 17 havingdownwardly extending pressed lugs 18 adapted to extend behind theangular shoulders 14 to withdraw the bolts as the key plate is rotated.The periphery of the key plate rotatably fits the side wall 19 in thecup and at its axis, this plate has an opening 20 for the reception ofthe tip 21 of the key. Surrounding this aperture is an interruptedannular ridge 22 defining a circular seat about the opening for thereception of the lower end of a rotatable lock barrel 23.

This ridge may be formed with one or more interruptions, being atpresent disclosed as comprising three sections 24, 25 and 26. Theadjacent ends of the sections 25 and 26 are in the form of abruptshoulders 27, providing key stops, while the adjacent ends of thesections 24, 26 and 2 k and 25 have sloping shoulders, indicated at 28,over which'the inner end of a key may sweep until it arrives inalignment with the spacebetween the shoulders 27. A ridge 22 may,however, be provided, whose sole interruption lies between the shoulders27, as illustrated in Figure 6.

The lock barrel 28 has the usual key slot 29 and at its upper end isformed with the usual head 30 having a reduced extension 31 usually ofthe same size as the main portion of the barrel. The lock plate 10 andcap 12 are provided with apertures receiving respectively the barrelintermediate its ends and the extension 31, the cap seating upon theupper surface of the lock plate and being secured to the cup by securingelements 32, extending through the lock plate. Thus, the cap serves toposition the outer end of the lock barrel while the key plate 17positions the inner end thereof. It will be obvious that with thestructure illustrated, two notches or tumbler slots may be formed in thekey, one to accommodate the edge of the cap opening, indicated at 33,and the other to accommodate the edge of the plate opening, indicated at34. It will also be obvious that by differently offsetting the metal ofthe lock plate 10 about the edges of the opening for differentlocks, thespace between these key notches will be altered for different locks,providing a number of key changes without resortin to lengthening of thelock barrel, which necessitates a change in the cap or of insertingadditional tumbler plates, which leads to difficulties in assembling.

At the same time, the lock barrel is rigidly maintained in its properposition in the lock.

It will be obvious that a lock of this character may be manufactured ata very low costand will be very durable and efficient in serv ice. Itwill also be obvious that the construction hereinbefore set forth iscapable of a certain range of change and modification without materiallydeparting from the spirit of the invention and I accordingly do notlimit myself to such specific structure eX- cept as hereinafter claimed.

I claim 1. In a look, a casing, a bolt within the casing andspring-pressed to project therefrom, a plate seated upon the bolt androtatable within the casing, a key barrel seated upon the plate at theaxis thereof, an integral interrupted rib upon the plate preventingtransverse displacement of the key barrel and the ends of which formkeystops, and means upon the plate having engagement with the bolt andretracting the same as the plate is rotatet 2. In a lock, a casing, abolt within the cas ing and spring-pressed to project therefrom, a plateseated upon the bolt and rotatable within the casing, a key barrelseated upon the plate at the axis thereof, an integral interrupted ribupon the plate preventing transverse displacement of the key barrel andthe ends of which form key stops, and an integral lug upon the platehaving engagement with the bolt retracting the same as the plate isrotated.

3. In a lock, a. casing, a bolt within the casing and spring-pressed toproject therefrom, a plate seated upon the bolt and rotatable within thecasing, a key barrel seated upon the plate at the axis thereof, anintegral interrupted rib upon the plate preventing transversedisplacement of the key barrel and the ends of which form key stops,means upon the plate having engagementwith the bolt retracting the sameas the plate is rotated, a cap for the casing having engagement with theouter end of the key barrel preventing transverse displacement thereofor longitudinal movement of the barrel permitting its disengagement fromthe shoulder of said plate, and a plate secured between the casing andcap fitting the key barrel at a point intermediate the ends thereof.

4. In a lock, a casing, a bolt within the easing and spring-pressed toproject therefrom, a plate seated upon the bolt and rotatable within thecasing, a key barrel seated upon the plate at the axis thereof, anintegral in terrupted rib upon the plate preventing transversedisplacement of the key barrel and the ends of which form key stops,means upon the plate having engagement with the bolt retracting the sameas the plate is rotated, a cap for the casing having engagement with theouter end of the key barrel preventing transverse displacement thereofor longitudinal movement of the barrel permitting its disengagement fromthe shoulder of said plate, and a plate secured between the casing andcap fitting the key barrel at a point intermediate the ends thereof,said plate being ofiset about the edges of the barrel receiving openingthereof.

5. In a look, a casing, a bolt within the easing and spring-pressed toproject therefrom, a rotatable key plate seated upon the bolt and havingengagement with the bolt whereby the bolt is retracted as the plate isrotated, a cap for the casing, a nonrotatable plate secured between thecap and easing, a key barrel having a head provided with a reducedextension engaging in an opening in the cap and fitting within anopening formed in said plate, the key plate having means associatedtherewith forming a socket to rotatably receive the inner end of the keybarrel said inner end abutting against the key plate.

6. In a look, a casing, a bolt within the easing and spring-pressed toproject therefrom, a rotatable key plate seated upon the bolt and havingengagement with the bolt whereby the bolt is retracted as the plate isrotated, a cap for the casing, a plate secured between the cap andeasing, a-key barrel having a head provided with a reduced extensionengaging in an opening in the cap and fitting within an opening formedin said plate, the key plate having means associated therewith forming asocket to rotatably receive the inner end of the key barrel and againstwhich the barrel abuts, said plate about the edges of the barrelreceiving opening being offset.

7. A trunk lock comprising a plate, a cup disposed at one side of theplate, a cap disposed at the opposite side of the plate and secured tothe cup through the plate, a pair of oppositely acting spring-pressedbolts within the cup and having smooth upper surfaces, 2. key plateseated upon said bolts and rotatable in the cup, a key barrel having ahead engaging the inner face of the cup and an extension upon said headfitting an opening in the cup, the plate having an opening receiving andfitting the key barrel, means upon the key plate having engagement withthe bolts retracting the same as the key plate is rotated, and meansupon the upper surface of the key plate combining therewith to guide thekey barrel and provide stops for engagement with a key insertedtherethrough.

8. A trunk lock comprising a plate, a cup disposed at one side of theplate, a cap disposed at the opposite side of the plate and secured tothe cup through the plate, a pairof oppositely acting spring-pressedbolts within the cup and having smooth upper surfaces, a key plateseated upon said bolts and rotatable in the cup, a key barrel having a.head engaging the inner face of the cup,

and an extension upon said head fitting an opening in the cup, the platehaving an opening receiving and fitting the key barrel, means upon thekey plate having engagement with the bolts retracting the same as thekey plate is rotated, and means upon the upper surface of the key platecombining therewith to guide the key barrel and provide stops forengagement with a key inserted therethrough, the means coasting with thebolts and the means positioning said key barrel comprising integralportions of the key plate.

9. A trunk lock comprising a plate, a cup disposed at one side of theplate, a cap disposed at the opposite side of the plate and secured tothe cup through the plate, a pair of oppositely acting spring-pressedbolts within the cup and having smooth upper surfaces, a key plateseated upon said bolts and rotatable in the cup, a key barrel having ahead engaging the inner face of the cup and an extension upon said headfitting an opening in the cup, the plate having an opening receiving andfitting the key barrel, means upon the key plate having engagement withthe bolts retracting the same as the key plate is rotated, and meansupon the upper surface of the key plate combining therewith to guide thekey barrel and provide stops for engage ment with a key insertedtherethrough, said plate being ofiset about the edges of the barrelreceiving opening.

In testimony whereof I hereunto affix my signature.

ALLEN T. LONG.

